My forms are not working properly

Hello I hope everything is fine.
My name is Paulo Vieira and I am doing my company’s newest website: https://www.castrointeriors.com/new-home
I am struggling with some problems regarding forms because they are not working. I have seen tuns of tutorials and templates, and I cannot figure out how to solve them.


Here is my site Read-Only: https://preview.webflow.com/preview/castrointeriors?utm_medium=preview_link&utm_source=designer&utm_content=castrointeriors&preview=b6c9133129e0797db20535b2fbdd7d99&pageId=5e7b3d21c21456caa69287e4&workflow=preview
(how to share your site Read-Only link)